Difference between revisions of "Guide number"
Line 1: | Line 1: | ||
The '''guide number''' is a value indicating the strength of a flashlight. According to Andreas Feininger the guide number helps finding the right aperture for flashlight exposures with the formula | The '''guide number''' is a value indicating the strength of a flashlight. According to Andreas Feininger the guide number helps finding the right aperture for flashlight exposures with the formula | ||
− | < | + | <U> guide number </U> |
distance between flash and image subject | distance between flash and image subject |
Revision as of 17:33, 28 May 2006
The guide number is a value indicating the strength of a flashlight. According to Andreas Feininger the guide number helps finding the right aperture for flashlight exposures with the formula
guide number distance between flash and image subject